/*
 * Copyright 2002-2016 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.context.event.test;

import java.util.UUID;

import org.springframework.context.ApplicationEvent;

/**
 * A basic test event that can be uniquely identified easily.
 *
 * @author Stephane Nicoll
 */
@SuppressWarnings("serial")
public abstract class IdentifiableApplicationEvent extends ApplicationEvent implements Identifiable {

    private final String id;

    protected IdentifiableApplicationEvent(Object source, String id) {
        super(source);
        this.id = id;
    }

    protected IdentifiableApplicationEvent(Object source) {
        this(source, UUID.randomUUID().toString());
    }

    protected IdentifiableApplicationEvent() {
        this(new Object());
    }

    @Override
    public String getId() {
        return this.id;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        IdentifiableApplicationEvent that = (IdentifiableApplicationEvent) o;

        return this.id.equals(that.id);

    }

    @Override
    public int hashCode() {
        return this.id.hashCode();
    }

}
